NIMA-related kinase 1 (NEK1) regulates meiosis I spindle assembly by altering the balance between α-Adducin and Myosin X.

NIMA-related kinase 1 (NEK1) regulates meiosis I spindle assembly by altering the balance between α-Adducin and Myosin X.
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DOI:
10.1371/journal.pone.0185780
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发表时间:
2017
期刊:
影响因子:
3.7
通讯作者:
Cohen PE
Cohen PE
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Brieño-Enríquez MA;Moak SL;Holloway JK;Cohen PE

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NIMA 相关激酶 1 (NEK1) 是一种丝氨酸/苏氨酸和酪氨酸激酶,在哺乳动物生殖细胞中高度表达。 Nek1 突变会导致贫血、多囊肾和不孕症。在这项研究中,我们评估了 NEK1 在雄性和雌性配子减数分裂纺锤体形成中的作用。我们的结果表明,NEK1 的缺乏会引起减数分裂 I 纺锤体的异常组织,其特征是纺锤体拉长和/或多极,以及异常的染色体国会。异常的纺锤体结构伴随着肌球蛋白 X (MYO10) 和 α-内收蛋白 (ADD1) 的定位和蛋白质水平的破坏,这两者都与有丝分裂期间纺锤体形成的调节有关。 ADD1 与 MYO10 的相互作用依赖于磷酸化,因此 ADD1 的磷酸化使其能够与有丝分裂纺锤体上的 MYO10 结合。 NEK1 突变小鼠中 ADD1 蛋白的减少与 ADD1 的过度磷酸化有关,从而阻止减数分裂纺锤体形成过程中与 MYO10 的相互作用。我们的结果揭示了 NEK1 在减数分裂过程中纺锤体结构和功能调节中的新调节作用。
NIMA-related kinase 1 (NEK1) is a serine/threonine and tyrosine kinase that is highly expressed in mammalian germ cells. Mutations in Nek1 induce anemia, polycystic kidney and infertility. In this study we evaluated the role of NEK1 in meiotic spindle formation in both male and female gametes. Our results show that the lack of NEK1 provokes an abnormal organization of the meiosis I spindle characterized by elongated and/or multipolar spindles, and abnormal chromosome congression. The aberrant spindle structure is concomitant with the disruption in localization and protein levels of myosin X (MYO10) and α-adducin (ADD1), both of which are implicated in the regulation of spindle formation during mitosis. Interaction of ADD1 with MYO10 is dependent on phosphorylation, whereby phosphorylation of ADD1 enables its binding to MYO10 on mitotic spindles. Reduction in ADD1 protein in NEK1 mutant mice is associated with hyperphosphorylation of ADD1, thereby preventing the interaction with MYO10 during meiotic spindle formation. Our results reveal a novel regulatory role for NEK1 in the regulation of spindle architecture and function during meiosis.
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